I think that some file in rootfs got corrupted hence I'm looking for someone to send me an image of the rootfs of a working K3 3G (UK [B00A] to try and repair it. Any help would be really appreciated. Thank you.

I think that some file in rootfs got corrupted hence I'm looking for someone to send me an image of the rootfs of a working K3 3G (UK [B00A] to try and repair it. Any help would be really appreciated. Thank you.

Would you be willing to share the process of how your going to get it onto the machine?

There is a K3 image in the simple debricking forensics pastebin. I do not know which version of K3 it is for (perhaps US). If the UK version is different, it would be nice to get an image of that for the forensics archive too...

Another problem with backup images is that the root pw no longer matches your serial number. I like to replace the password hash with a "mario" hash. Otherwise the root pw can be cracked with the fiona wordlist (in tools index) using john (the ripper).

When I am able (in a few weeks) I will add root pw to each backup image description in the pastebin.

If the kernel modules in that image can be loaded by the kernel in your Kindle...
Most likely yes - although the 3g carrier information may be wrong.
In the US, the 3g service is via AT&T - in GB ???

So make and keep a copy of your "broken" system image before you overwrite it. You may have to pull the 3g carrier stuff for your country out of that "broken" image.

You can select carriers in the Alt-311 screen.

In any case, good to make a backup copy of your "damaged" main partition first (swap the if= and of= parameters), then you can mount it and repair any damage to files in that image file on a linux host PC (or in a VM). And then you can "dd" your own repaired image file onto the kindle later if you need to...

Thinking about it, it may not work. Remember that a US Kindle has an AT&T SIM card in it; a UK Kindle has a Vodafone SIM in it. The fact that a US Kindle works in the UK doesn't necessarily mean that a US ROM image (with AT&T config data) will correctly talk to the Vodafone SIM that's in a UK Kindle.

Well, it might work for the OP, depending on how it is used. When only used to extract some files - not including 3G config - that may be fine. But then the question could have been for those files only in the first place...